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<td class="header-group page-location"><a href="../refmanual.html" class="navigation-link">Front Page</a> / <a href="./metafunctions.html" class="navigation-link">Metafunctions</a> / <a href="./bitwise-operations.html" class="navigation-link">Bitwise Operations</a> / <a href="./shift-right.html" class="navigation-link">shift_right</a></td>
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<div class="section" id="shift-right">
<h1><a class="toc-backref" href="./bitwise-operations.html#id1558">shift_right</a></h1>
<div class="section" id="id1125">
<h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
<pre class="literal-block">
template&lt;
      typename T
    , typename Shift
    &gt;
struct <a href="./shift-right.html" class="identifier">shift_right</a>
{
    typedef <em>unspecified</em> type;
};
</pre>
</div>
<div class="section" id="id1126">
<h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
<p>Returns the result of bitwise <em>shift right</em> (<tt class="literal"><span class="pre">&gt;&gt;</span></tt>) operation on <tt class="literal"><span class="pre">T</span></tt>.</p>
</div>
<div class="section" id="id1127">
<h3><a class="subsection-title" href="#header" name="header">Header</a></h3>
<pre class="literal-block">
#include &lt;<a href="../../../../boost/mpl/shift_right.hpp" class="header">boost/mpl/shift_right.hpp</a>&gt;
#include &lt;<a href="../../../../boost/mpl/bitwise.hpp" class="header">boost/mpl/bitwise.hpp</a>&gt;
</pre>
</div>
<div class="section" id="id1128">
<h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3>
<p><a class="reference internal" href="./numeric-metafunction.html">Numeric Metafunction</a></p>
</div>
<div class="section" id="id1129">
<h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3>
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<col width="21%" />
<col width="42%" />
<col width="37%" />
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<thead valign="bottom">
<tr><th class="head">Parameter</th>
<th class="head">Requirement</th>
<th class="head">Description</th>
</tr>
</thead>
<tbody valign="top">
<tr><td><tt class="literal"><span class="pre">T</span></tt></td>
<td><a class="reference internal" href="./integral-constant.html">Integral Constant</a></td>
<td>A value to shift.</td>
</tr>
<tr><td><tt class="literal"><span class="pre">Shift</span></tt></td>
<td>Unsigned <a class="reference internal" href="./integral-constant.html">Integral Constant</a></td>
<td>A shift distance.</td>
</tr>
</tbody>
</table>
<p>[<em>Note:</em> The requirements listed in this specification
are the ones imposed by the default implementation. See <a class="reference internal" href="./numeric-metafunction.html">Numeric Metafunction</a> concept
for the details on how to provide an implementation for a user-defined numeric type
that does not satisfy the <a class="reference internal" href="./integral-constant.html">Integral Constant</a> requirements. — <em>end note</em>]</p>
</div>
<div class="section" id="id1130">
<h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3>
<p>For arbitrary <a class="reference internal" href="./integral-constant.html">Integral Constant</a> <tt class="literal"><span class="pre">c</span></tt> and unsigned <a class="reference internal" href="./integral-constant.html">Integral Constant</a> <tt class="literal"><span class="pre">shift</span></tt>:</p>
<pre class="literal-block">
typedef <a href="./shift-right.html" class="identifier">shift_right</a>&lt;c,shift&gt;::type r;
</pre>
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<tr class="field"><th class="field-name">Return type:</th><td class="field-body"><p class="first"><a class="reference internal" href="./integral-constant.html">Integral Constant</a>.</p>
</td>
</tr>
<tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first">Equivalent to</p>
<pre class="last literal-block">
typedef <a href="./integral-c.html" class="identifier">integral_c</a>&lt;
      c::<a href="./value-type.html" class="identifier">value_type</a>
    , ( c::value &gt;&gt; shift::value )
    &gt; r;
</pre>
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<pre class="literal-block">
typedef <a href="./shift-right.html" class="identifier">shift_right</a>&lt;c,shift&gt; r;
</pre>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
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<tbody valign="top">
<tr class="field"><th class="field-name">Return type:</th><td class="field-body"><p class="first"><a class="reference internal" href="./integral-constant.html">Integral Constant</a>.</p>
</td>
</tr>
<tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first">Equivalent to</p>
<pre class="last literal-block">
struct r : <a href="./shift-right.html" class="identifier">shift_right</a>&lt;c,shift&gt;::type {};
</pre>
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</tbody>
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</div>
<div class="section" id="id1131">
<h3><a class="subsection-title" href="#complexity" name="complexity">Complexity</a></h3>
<p>Amortized constant time.</p>
</div>
<div class="section" id="id1132">
<h3><a class="subsection-title" href="#example" name="example">Example</a></h3>
<pre class="literal-block">
typedef <a href="./integral-c.html" class="identifier">integral_c</a>&lt;unsigned,0&gt; u0;
typedef <a href="./integral-c.html" class="identifier">integral_c</a>&lt;unsigned,1&gt; u1;
typedef <a href="./integral-c.html" class="identifier">integral_c</a>&lt;unsigned,2&gt; u2;
typedef <a href="./integral-c.html" class="identifier">integral_c</a>&lt;unsigned,8&gt; u8;

<a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( (<a href="./shift-right.html" class="identifier">shift_right</a>&lt;u0,u0&gt;::value), ==, 0 );
<a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( (<a href="./shift-right.html" class="identifier">shift_right</a>&lt;u1,u0&gt;::value), ==, 1 );
<a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( (<a href="./shift-right.html" class="identifier">shift_right</a>&lt;u1,u1&gt;::value), ==, 0 );
<a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( (<a href="./shift-right.html" class="identifier">shift_right</a>&lt;u2,u1&gt;::value), ==, 1 );
<a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( (<a href="./shift-right.html" class="identifier">shift_right</a>&lt;u8,u1&gt;::value), ==, 4 );
</pre>
</div>
<div class="section" id="id1133">
<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
<p><a class="reference internal" href="./bitwise-operations.html">Bitwise Operations</a>, <a class="reference internal" href="./numeric-metafunction.html">Numeric Metafunction</a>, <a class="reference internal" href="./numeric-cast.html">numeric_cast</a>, <a class="reference internal" href="./shift-left.html">shift_left</a>, <a class="reference internal" href="./bitand.html">bitand_</a></p>
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